Cyclones in the Pacific made it snow in Rome, and soon that weather will hit the US

Your regular reminder that weather is a wild system of tiny causes and huge effects. Snow on the Roman Forum in 2012, because this is obviously not the first time it's even snowed in Rome. Stefano Costantini A butterfly in the form of two tropical cyclones flapped its wings in the Pacific, and now Rome is covered in a dusting of snow.